Manganese
City of Oak Harbor
Manganese is a naturally occurring element that is common in food and drinking water. Excessive manganese exposures may impair children's attention, memory and intellectual capacity. Click here to read more about manganese.
8
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 2.54 ppb | 8 | 4 | ND - 9.80 ppb |
| 2019 | 8.64 ppb | 5 | 5 | 0.500 ppb - 30.0 ppb |
| 2020 | 0.400 ppb | 1 | 1 | 0.400 ppb |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | 30.3 ppb | 2 | 1 | ND - 60.5 ppb |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 100 ppb
The EWG Health Guideline of 100 ppb for manganese was defined by the state of Minnesota as a health risk limit, the concentration of a contaminant that can be consumed with little or no risk to health. This health guideline protects against harm to the brain and nervous system.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2019-06-18 | 19-22301-43579 | 9.70 ppb |
| 2019-08-15 | 2.00 ppb | |
| 2019-09-05 | 30.0 ppb | |
| 2019-09-10 | 19-34698-67034 | 0.500 ppb |
| 2019-12-17 | 19-47900-93017 | 0.990 ppb |
| 2020-03-10 | 20-08660-16906 | 0.400 ppb |
| 2023-06-27 | 4486113 | ND |
| 2023-06-27 | 4472715 | 60.5 ppb |